{
  "$type": "site.standard.document",
  "description": "A microporous membrane winding includes a microporous membrane wound around a core. The core has an outer diameter of 5 inches or greater, and has an outer surface with a surface roughness of 3.0 µm or less. A microporous membrane that is excellent in thickness uniformity and is favorably used as a…",
  "path": "/patents/1010476",
  "publishedAt": "2011-08-03T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "B65H18/08",
    "ASAHI KASEI E MATERIALS CORP [JP]"
  ],
  "textContent": "A microporous membrane winding includes a microporous membrane wound around a core. The core has an outer diameter of 5 inches or greater, and has an outer surface with a surface roughness of 3.0 µm or less. A microporous membrane that is excellent in thickness uniformity and is favorably used as a separator for a lithium-ion secondary battery can be obtained from the microporous membrane winding.",
  "title": "ROLL OF MICROPOROUS FILM AND PROCESS FOR PRODUCTION THEREOF"
}